After spending what seemed like ages at the dull Canterlot Castle for political reasons, Twilight is relieved when Pinkie comes to help liven the place up and spend some quality time with her.
What's one of the more embarrassing things you could ever have happen to you? Getting a wingboner in front of all your friends seems pretty high on the list. Twilight is of course grateful for her wings, but they do have their downsides.
Twilight knows something's up when Pinkie asks her for help with writing. But what harm could it do? Writing always was one of her favourite subjects...
With everypony else unavailable, Spike volunteers to babysit Flurry Heart for the day. Things go well, but then Sweetie Belle comes and shakes things up by deciding to help, too. The day goes on, and they spend it like their own, little family.
"He truly loved her and knew she loved him just as much. The dragon gulped deeply as a fluttering sensation occupied his stomach. He didn't just love Twilight as a friend."
Celestia likes her routine. Tax reforms, grants, laws and construction projects are all a princess needs to be content. It's just her luck that for Pinkie Pie, "content" is not nearly enough.
A peek at various times of the Mane Six, Spike, and friends, all play Dungeons and Dragons/Ogres and Oubliettes, Paranoia, Call of Ponythulu, Toon, an adaption of themselves, and just about every other role playing game under Celestia's sun.